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Constructing Ti_(3)C_(2)T_(x)-MXene-based gradient woodpile structure by direct ink writing 3D printing for efficient microwave absorption

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International Journal of Minerals,Metallurgy and materials 2025年第3期32卷 657-667页

作者： Changtian Zhu Pei Liu Jin Chen Zixuan Ding Guohui Tang Qingqing Gao Yinxu Ni Kai Xu Zhilei Hao Gaojie Xu Fenghua Liu School of Materials Science and Chemical Engineering Ningbo UniversityNingbo 315211China Ningbo Institute of Materials Technology&Engineering Chinese Academy of SciencesNingbo 315201China

As a novel 2D material,Ti_(3)C_(2)T_(x)-MXene has become a major area of interest in the field of microwave absorption(MA).However,the MA effect of common Ti_(3)C_(2)T_(x)-MXene is not prominent and often requires complex processes or combinations of other ma-terials to achieve enhanced *** this context,a kind of gradient woodpile structure using common Ti_(3)C_(2)T_(x)-MXene as MA ma-terial was designed and manufactured through direct ink writing(DIW)3D *** minimum reflection loss(RL_(min))of the Ti_(3)C_(2)T_(x)-MXene-based gradient woodpile structures with a thickness of less than 3 mm can reach-70 dB,showing considerable improve-ment compared with that of a completely filled *** addition,the effective absorption bandwidth(EAB)reaches 7.73 *** study demonstrates that a Ti_(3)C_(2)T_(x)-MXene material with excellent MA performance and tunable frequency band can be successfully fab-ricated with a macroscopic structural design and through DIW 3D printing without complex material hybridization and modification,of-fering broad application prospects by reducing electromagnetic wave radiation and interference.

关键词： Ti_(3)C_(2)T_(x)-MXene electromagnetic wave absorption macro-design impedance matching 3D printing ink

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High magnetic energy product in isotropic nanocomposite powders with high percent of soft phase towards ultrastrong magnets

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Journal of materials Science & technology 2023年第13期144卷 161-167页

作者： Longfei Ma Wei Quan Jinkui Fan Yanbai Chen Qiang Zheng Baoru Bian Jian Zhang Juan Du Institute of Materials School of Materials Science and EngineeringShanghai UniversityShanghai 200444China Ningbo Institute of Material Technology&Engineering Chinese Academy of SciencesNingbo 315201China

Nanostructure of magnetically hard and soft materials is fascinating for exploring next-generation ul-trastrong permanent magnets with less expensive rare-earth ***,the resulting hard/soft nanocomposites often exhibit a low remanence/energy product due to the challenge in obtaining ideal phase components and appropriate soft phase *** this work,a novel microstructure of multiple phases consisting of 1:5 phase and 1:3 phase as main hard phase,and a high ratio of Fe(Co)(27 wt.%-48 wt.%)as soft phase was obtained in Sm-Co(Fe)/Fe nanocomposite *** grain size of both hard and soft phases below 15 nm was *** optimal energy product for Sm-Co(Fe)/Fe(Co)nanocom-posite is 2.1 times(an increment of 107%)of the corresponding single-hard-phase powders without soft *** reports that the isotropic nanocomposite powders exhibit a record of magnetic energy product larger than 25 MGOe(the highest value is 28.6 MGOe).The high performance and the microstructure achieved in this work for the isotropic powders will shed light on and provide a good premise for syn-thesizing high performance anisotropic bulk nanocomposite magnets.

关键词： Nanocomposite Sm-Co(Fe)/Fe(Co) Microstructure Phase composition Phase fraction Magnetic energy product

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Uncovering the electrooxidation behavior of 5-hydroxymethylfurfural on Ni/Co electrodes

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Journal of Energy Chemistry 2024年第5期92卷 1-7页

作者： Shilin Fan Bin Zhu Xiao Yu Yang Gao Weiping Xie Yong Yang Jian Zhang Chunlin Chen Ningbo Institute of Materials Technology&Engineering Chinese Academy of SciencesNingbo 315201ZhejiangChina University of Chinese Academy of Sciences Beijing 100049China

Biomass,derived from plant photosynthesis that captures carbon dioxide to form carbohydrates,offers vast renewable *** electrooxidation of biomass,coupled with the hydrogen evolution reaction,enables the simultaneous production of biomass-based plastic monomers and green hydrogen,attracting significant scholarly ***,ambiguity remains regarding the adsorption mechanism at the catalyst surface(Langmuir-Hinshelwood or Eley-Rideal)and the adsorbed substrate *** address this,we prepared a Ni/Co electrode for the electrooxidation of 5-hydroxymethylfurfural(HMF)into 2,5-furandicarboxylic acid(FDCA)through a corrosion reaction and electro-reduction *** conversion reached 100.00%,FDCA yield reached 96.82%,and Faradic efficiency(FE)reached 92.14%.Meaningfully,utilizing in-situ spectroscopy and electrochemical methods,this work provided valuable insights into active sites and catalyst surface adsorption.

关键词： Electrocatalysis Electrochemistry 2,5-Furandicarboxylicacid 5-Hydroxymethylfurfural Biomass

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Highly efficient ternary organic solar cells with excellent open-circuit voltage and fill factor via precisely tuning molecular stacking and morphology

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Science China Chemistry 2024年第3期67卷 963-972页

作者： Dinghong Sun Zhenyu Chen Jianfeng Zhang Wei Song Jingyu Shi Jintao Zhu Yuanyuan Meng Fei Jin Shuncheng Yang Ziyi Ge Faculty of Electrical Engineering and Computer Science Ningbo UniversityNingbo 315211China Faculty of Material Science and Chemical Engineering Ningbo UniversityNingbo 315211China Zhejiang Provincial Engineering Research Center of Energy Optoelectronic Materials and Devices Ningbo Institute of Materials Technology&EngineeringChinese Academy of SciencesNingbo 315201China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing 100049China Department of Chemical and Environmental Engineering University of Nottingham NingboNingbo 315100China

The micro-morphology and molecular stacking play a key role in determining the charge transport process and nonradiative energy loss, thus impacting the performances of organic solar cells(OSCs). To address this issue, a non-fullerene acceptor PhC6-IC-F with alkylbenzene side-chain, possessing optimized molecular stacking, complementary absorption spectra and forming a cascade energy level alignment in the PM6:BTP-eC9 blend, is introduced as guest acceptor to improve efficiency of ternary OSCs. The bulky phenyl in the side-chain can regulate crystallinity and optimizing phase separation between receptors in ternary blend films, resulting in the optimal phase separations in the ternary films. As a result, high efficiencies of 18.33% as photovoltaic layer are obtained for PhC6-IC-F-based ternary devices with excellent fill factor(FF) of 78.92%. Impressively, the ternary system produces a significantly improved open circuit voltage(V_(oc)) of 0.857 V compared with the binary device,contributing to the reduced density of trap states and suppressed non-radiative recombination result in lower energy loss. This work demonstrates an effective approach for adjusting the aggregation, molecular packing and fine phase separation morphology to increase V_(oc) and FF, paving the way toward high-efficiency OSCs.

关键词： alkylbenzene side-chain morphology regulation ternary blends organic solar cells

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Construction of attapulgite-based one-dimensional nanonetwork composites with corrosion resistance for high-efficiency microwave absorption

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International Journal of Minerals,Metallurgy and materials 2025年第3期32卷 689-698页

作者： Kai Xu Qingqing Gao Shaoqi Shi Pei Liu Yinxu Ni Zhilei Hao Gaojie Xu Yan Fu Fenghua Liu School of Materials Science and Chemical Engineering Ningbo UniversityNingbo 315211China Zhejiang Key Laboratory of Additive Manufacturing Materials Ningbo Institute of Materials Technology&EngineeringChinese Academy of SciencesNingbo 315201China Northwest Yongxin Coatings Limited Company Lanzhou 730046China

Exploring high-efficiency and broadband microwave absorption(MA)materials with corrosion resistance and low cost is ur-gently needed for wide practical ***,the natural porous attapulgite(ATP)nanorods embedded with TiO_(2)and polyaniline(PANI)nanoparticles are synthesized via heterogeneous precipitation and in-situ *** obtained PANI-TiO_(2)-ATP one-di-mensional(1D)nanostructures can intertwine into three-dimensional(3D)conductive network,which favors energy *** min-imum reflection loss(RL_(min))of the PANI-TiO_(2)-ATP coating(20wt%)reaches-49.36 dB at 9.53 GHz,and the effective absorption band-width(EAB)can reach 6.53 GHz with a thickness of 2.1 *** excellent MA properties are attributed to interfacial polarization,mul-tiple loss mechanisms,and good impedance matching induced by the synergistic effect of PANI-TiO_(2)nanoparticle shells and ATP *** addition,salt spray and Tafel polarization curve tests reveal that the PANI-TiO_(2)-ATP coating shows outstanding corrosion resist-ance *** study provides a low-cost and high-efficiency strategy for constructing 1D nanonetwork composites for MA and corrosion resistance applications using natural porous ATP nanorods as carriers.

关键词： microwave absorption corrosion resistance attapulgite TiO_(2) polyaniline

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Research status of high efficiency deep penetration welding of medium-thick plate titanium alloy:A review

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Defence technology(防务技术) 2025年第3期45卷 178-202页

作者： Zhihai Dong Ye Tian Long Zhang Tong Jiang Dafeng Wang Yunlong Chang Donggao Chen Inner Mongolia Metal Material Research Institute Baotou014000China Ningbo Surface Engineering Research Institute Co.LTD Ningbo315000China School of Materials Science and Engineering Shenyang University of TechnologyShenyang110870China

Titanium alloy has the advantages of high strength,strong corrosion resistance,excellent high and low temperature mechanical properties,etc.,and is widely used in aerospace,shipbuilding,weapons and equipment,and other *** recent years,with the continuous increase in demand for medium-thick plate titanium alloys,corresponding welding technologies have also continued to ***,this article reviews the research progress of deep penetration welding technology for medium-thick plate titanium alloys,mainly covering traditional arc welding,high-energy beam welding,and other welding *** many methods,narrow gap welding,hybrid welding,and external energy field assistance welding all contribute to improving the welding efficiency and quality of medium-thick plate titanium ***,the development trend of deep penetration welding technology for mediumthick plate titanium alloys is prospected.

关键词： Titanium alloy Deep penetration welding Narrow gap welding Hybrid welding External energy field assistance welding

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Anomalous Hall effect and electronic correlation in a spin-reoriented kagome antiferromagnet LuFe_(6)Sn_(6)

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Chinese Physics B 2024年第10期33卷 46-51页

作者： Meng Lyu Yang Liu Shen Zhang Junyan Liu Jinying Yang Yibo Wang Yiting Feng Xuebin Dong Binbin Wang Hongxiang Wei Enke Liu Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China Ningbo Institute of Materials Technology&Engineering Chinese Academy of SciencesNingbo 315201China

The kagome lattice system has been identified as a fertile ground for the emergence of a number of new quantumstates,including superconductivity,quantum spin liquids,and topological electronic *** has attracted significantinterest within the field of condensed matter ***,we present the observation of an anomalous Hall effect in aniron-based kagome antiferromagnet LuFe_(6)Sn_(6),which implies a non-zero Berry curvature in this *** means ofextensive magnetic measurements,a high Neel temperature,T_(N)=552 K,and a spin reorientation behavior were identifiedand a simple temperature-field phase diagram was ***,this compound was found to exhibit a largeSommerfeld coefficient ofγ=87 mJ·mol^(-1)·K^(-2),suggesting the presence of a strong electronic correlation *** indicates that LuFe_(6)Sn_(6)is an intriguing compound that may exhibit magnetism,strong correlation,and topologicalstates.

关键词： kagome lattice anomalous Hall effect magnetism electronic correlation

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Distinct amorphization resistance in highentropy MAX-phases(Ti,M)_(2)AlC(M=Nb,Ta,V,Zr)under in situ irradiation

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npj Computational materials 2024年第1期10卷 1208-1217页

作者： Hao Xiao Shuang Zhao Jun Zhang Shijun Zhao Youbing Li Ke Chen Liuxuan Cao Yugang Wang Qing Huang Chenxu Wang State Key Laboratory of Nuclear Physics and Technology Center for Applied Physics and TechnologyPeking University100871 BeijingChina Shenzhen Pinghu Laboratory Shenzhen518111China Department of Mechanical Engineering City University of Hong KongHong Kong999077China Ningbo Institute of Material Technology&Engineering Chinese Academy of Sciences(CAS)Ningbo315201China College of Energy Xiamen UniversityXiamen361102China

High-entropy materials have been proposed for applications in nuclear systems recently due to their outstanding properties in extreme *** complexity in these materials plays an important role in irradiation tolerance ... 详细信息

关键词： entropy extreme dissipation

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Optimizing large optical contrast in Ge-Se-Te films via high-throughput method

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Progress in Natural Science:materials International 2025年第1期35卷 222-228页

作者： Qiqi Chen Guoxiang Wang Zijun Liu Yixiao Gao Chenjie Gu Tiefeng Xu Xiang Shen Yimin Chen Laboratory of Infrared Material and Devices & Key Laboratory of Photoelectric Materials and Devices of Zhejiang Province Advanced Technology Research InstituteNingbo University Department of Microelectronic Science and Engineering School of Physical Science and Technology Ningbo University Ningbo Solartrum Co.Ltd.

Chalcogenide phase-change materials（PCMs） have attracted great attentions due to their potential applications in reconfigurable photonic devices. The Ge2Sb2Te5and GeTe PCMs exhibit significant difference in refractive index（Δn） between amorphous and crystalline states, but they suffer from high optical loss. The binary Sb2S3and Sb2Se3PCMs, however, show low optical loss but small Δn. This encourages us to develop the novel materials,which are desired to combine large Δn and low optical loss. Instead of traditional trial-and-error screening method, we here used an efficient high-throughput method to optimize the PCMs' candidates for reconfigurable photonic devices in Ge-Se-Te chalcogenides. The crystallization temperature and difference in optical bandgap were detected, and then the component of Ge25Se7Te68, which also exhibits ultralow optical loss of 1.2 × 10-6（in amorphous state） and large Δn of 1.32 at 1550 nm, was optimized. This Te-rich Ge-Se-Te film can be a candidate for the applications of programmable reconfigurable photonic circuits.

关键词： Chalcogenide phase-change films High-throughput Reconfigurable photonics Refractive index

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Effect of TbF_(3)diffusion on the demagnetization behavior and domain evolution of sintered Nd-Fe-B magnets by electrophoretic deposition

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Chinese Physics B 2023年第9期32卷 481-485页

作者：曹学静郭帅谢宇恒金磊丁广飞郑波陈仁杰闫阿儒 CISRI and NIMTE Joint Innovation Center for Rare Earth Permanent Magnets Ningbo Institute of Material Technology and EngineeringChinese Academy of SciencesNingbo 315201China CAS Key Laboratory of Magnetic Materials and Devices Ningbo Institute of Material Technology and EngineeringChinese Academy of SciencesNingbo 315201China

We studied the magnetic properties and domain evolution of annealed and TbF3-diffused sintered Nd-Fe-B magnets using the electrophoretic deposition *** TbF_(3)diffusion,the coercivity increased significantly by 9.9 kOe and microstructural analysis suggested that Tb favored the formation of the(Nd,Tb)_(2)Fe_(14)B shell phase in the outer region of the matrix *** first magnetization reversal and the dynamic successive domain propagation process were detected with a magneto-optical Kerr *** the TbF_(3)-diffused magnet,the magnetization reversal appeared at a larger applied field and the degree of simultaneous magnetization reversal decreased compared with an annealed *** demagnetization after full magnetization,the occurrence of domain wall motion(DWM)in the reproduced multi-domain regions was observed by the step *** maximum polarization change resulting from the reproduced DWM was inversely related to the *** increased coercivity for the diffused magnet was mainly attributed to the more difficult nucleation of the magnetic reversed region owing to the improved magneto-crystalline anisotropy field as a result of Tb diffusion.

关键词： sintered Nd-Fe-B magnet electrophoretic deposition grain boundary diffusion domain evolution

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